Rubber cutting machine



Jan. 16, 1945. J. H. SWEENEY RUBBER CUTTING MACHINE Filed April 28, 1-943 2 Sheets-Sheet l INVENTQR BY JOHN H .s EENEX @Jfi A 0R EY Jan. 16, 1945. J. H. SWEENEY 2,367,243

RUBBER CUTTING MACHINE Filed April 2B, 1943 2 Sheets-Sheet 2 INVENTOR BY JOHN ntswv e Patented Jan. 16,3945

UNITED] nonsense-rinse inseam: 1 John H. Sweeney, Philadelphiafl a. 3 A plication Arms, 1943,- Serial No. 484,853

" acunae. (or-items) I. (Granted the act 15813, as

' amended April 30, 1928; 370 O- G. 757) This invention relates to" a rubber-"emulat n chine and has for an object to providea machine especially designed to cut gaskets from stock rubs ber, which gaskets will be' of variable "sizes and cross-sections suitable for" water-tight doors,

hatches, manhole covers, etc., for use on submarines and other vessels. I r

A further object of this .invention is to provide a rubber cutting machine which will handle a piece of rubber stock and quickly and easily cut able for quickly and accurately cutting an odd size gasket from sheet stock, eliminating the problem either of cutting such gasket by hand, which is necessarily a rough job, or molding the gasket, which consumes considerable time.

With the foregoing and other objects in view,

the invention consists in the construction, combination and arrangement of parts hereinafter described and illustrated in thedrawings, in which:

Fig. 1 is a side elevational view ofthe gasket cutting machine of this invention. Fig. 2 is a sectional view on'line 2--2 of Fig. 1, with the handle in vertical position.

Fig. 3 is an elevational view of the plate bracket support and scale, partly broken away; and I Fig. 4 is a side elevationalview on an'enlarged scale.

There is shown at NJ the rubber cutting machine of this invention. This machine consists,

broadly of a rotatable rubber stock carrying wheel II secured to a shaft [2 which is journalled between a pair of supporting U-shaped posts l4 and I5, these posts I 4 and I5 being secured at their top by a crossbar I6. The wheel H has secured thereto'a drum I! as by bolts 18. This drum I! carries a circularflange on which is mounted a rubber pad 2|, while a second pad 22 is cemented against the extending edge,23 of the drum [1 This padded flange 20 provides a seat for receiving the rubber stock 24 during thev cutting operations.

Secured to opposite sides of the U-shaped support [4 are a pair of brackets 25 to each of which is adjustably secured an arm 26 carrying a flange roller 21. The rollers are so held by their arms 26 that they Will overlap and press down the rub- I ber stock 24 while the cutting therein is being made by means of the adr nalin-mounted knife blade28; This knife-blade 28 is inoiiiit'ed iii a blade holder 30 adapted to be vertically adjusted by means of a feed screw 3| and an angle arm 32. This angle arm 32 is in turn mounted on a plate 33'provided with a slot 34 through which extends a securing bolt 35 to an angle iron 36 mounted on the supporting post M. A web 31 Welded to the plate 33 has a set screw 38 extending therethrough for securing the blade holder 30 in adjusted position. The plate 33 is horizontally adjustable along a scale 43 whereby the width of the cut 4| in the gasket 24 may be de-' termined. The shaft I2 is journalled in bearings 42 through the supporting posts l4 and [5, the bearings 42 being provided with lubrication holes 43. A coupling 44 serves to space the back of the wheel II from the back post [5 while an operating crank handle 45 is secured to the forwardly extending end of the shaft l2.

' It is obvious, however, that if speedier operation is desired, that a moto'rof any nature may be utilized torotate the shaft l2. Similarly, the

will be placed along a different edge, thereby enabling the knife blade 28 to make a horizontal instead of a vertical cut in the rubber stock 24. Similarly, the angle arm 32 could be placed diagonally on the supporting plate, and by utilizin a vertical slot in place of a horizontal slot 34 the knife blade could, be adjusted to make beveled cuts in the rubber stock 24. The pipe 46 leading from a bucket or other suitable source, is providedfor dripping water on the stock as it approaches the cutting blade.

In operation, the stock 24 is placed over the padded drum flange 20 and held in position thereon by means of the rollers 21 which are adjusted to press the stock tightly'against the padded back 22. The plate 33 is then adjusted along the scale 40 so as to make a cut of the desired width and the screw feed 3| is rotated to force the blade 28 for the proper depth into the stock 24.

Water pipe 46 is adjusted to drip water on the top of the stock 24 just before it reaches the cuttingblade 28 so as to facilitate the cutting. The crank handle 45 isthen rotated, drawing the stock 24 around beneath the cutting blade 28 and making the desired cut, thus providing a gasket of the desired width.

Other modifications and changes in the number and proportions of the parts may be made by those skilled in the art without departing from the United States of America for governmental 5 purposes without the payment of any royalties thereon on therefor.

What is claimed is:

1. A rubber cutting device comprising a rotatable rubber stock carrying wheel, a shaft to which said wheel is fixed, means for rotating said shaft, a support on which said rotatable shaft is journalled, a rubber cutting blade adjustably mounted on said support, a feed screw for adjusting the stock pressing roller adjustably mounted on each of said brackets.

2. A rubber cutting device comprising a rotatable rubber stock carrying wheel, a shaft to which said wheel is fixed, means for rotating said shaft, a support on which said rotatable shaft is journalled, a rubber cutting blade adjustably mounted on said sup rt, a feed screw for adjusting the depth of cut of said blade, transversely adjustable means for mounting said adjustable blade on said support said adjustable position and holding means comprising a pair of brackets, one of said brackets being mounted on said support on one side of said cutting blade, the other of depth of cut of said blade, and transversely ad- 5 said brackets being mounted on said support on justable means for mounting said adjustable blade on said support said adjustable position and holding means comprising a pair of brackets, one of said brackets being mounted on said support on one side of said cutting blade, the other 2 of said brackets being mounted on said support on the other side of said cutting blade, and a the other side of said cutting blade, and a stock pressing roller adjustably mounted on each of said brackets, one of said rollers being flanged, and a scale on said support for cooperation with said transversely adjustable means to determine the width of cut of said blade.

JOHN H. SWEENEY. 

